Flannery discusses greenhouse gas levels - the bad news

"TIM FLANNERY: That's right. We thought we'd be at that threshold within about a decade, we thought we had that much time. But the new data indicates that in about mid 2005 we crossed that threshold. So as of mid 2005, there was about 455 parts per million of what's called carbon dioxide equivalent. And that's a figure that's gathered by taking the potential of all of the 30 greenhouse gases and converting them into carbon dioxide potential, so we call it CO2 equivalent." [ABC Television,"Lateline,8 October 2007]
See link for full transcript:
http://www.abc.net.au/lateline/content/2007/s2054168.htm